Answer:
STEP 1:let the arithmetic mean be p, q, r hence 4,p, q, r, 18
STEP 2:U5=18=a+4d
a+4d=18
we're a=4 therefore
4+4d=18
STEP 3:4d/4=(18-4)÷4=14/4
d=14/4=3.5
p=U2=a+d=4+3.5=7.5
q=U3=a+2d=4+(2×7.5)
=
The arithmetic mean of two numbers is found by adding them together and dividing the sum by 2.
So, the arithmetic mean of 4 and 18 is:
(4 + 18) / 2 = 22 / 2 = 11
Therefore, the arithmetic mean of 4 and 18 is 11.
Explanation:
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